<template>
    <div class="app-container">
        课程导入
        <el-form label-width="120px">
            <el-form-item label="信息描述">
                <el-tag type="info">excel模版说明</el-tag>
                <el-tag>
                    <i class="el-icon-download" />
                    <a :href="'/static/01.xlsx'">点击下载模版</a>
                </el-tag>
            </el-form-item>
            <el-form-item label="选择Excel">
                <el-upload ref="upload"
                           :auto-upload="false"
                           :on-success="fileUploadSuccess"
                           :on-error="fileUploadError"
                           :disabled="importBtnDisabled"
                           :limit="1"
                           :action="BASE_API + '/eduservice/edu-subject/addSubject'"
                           name="file"
                           accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet">
                    <el-button slot="trigger"
                               size="small"
                               type="primary">选取文件</el-button>
                    <el-button :loading="loading"
                               style="margin-left: 10px"
                               size="small"
                               type="success"
                               @click="submitUpload">上传到服务器</el-button>
                </el-upload>
            </el-form-item>
        </el-form>
    </div>
</template>

<script>
export default {
    data() {
        return {
            BASE_API: process.env.BASE_API, // 接口API地址
            importBtnDisabled: false, // 按钮是否禁用,
            loading: false,
        };
    },
    methods: {
        // 点击按钮上传文件到接口
        submitUpload() {
            this.importBtnDisabled = true;
            this.loading = true;
            // 通过 ref="upload" 绑定
            this.$refs.upload.submit();
        },

        // 上传成功后
        fileUploadSuccess(resp) {
            // 提示信息
            if (resp.success == true) {
                this.loading = false;
                this.$message({
                    type: "success",
                    message: resp.message,
                });
            }

            // 跳转到课程分类页面
            this.$router.push({
                path: "/subject/list",
            });
        },

        // 上传失败后
        fileUploadError(resp) {
            this.loading = false;
            this.$message({
                type: "error",
                message: "导入失败",
            });
        },
    },
};
</script>